/*
 * Copyright 2023 The Backstage Authors
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

import { createSignInResolverFactory } from './createSignInResolverFactory';

/**
 * A collection of common sign-in resolvers that work with any auth provider.
 *
 * @public
 */
export namespace commonSignInResolvers {
  /**
   * A common sign-in resolver that looks up the user using their email address
   * as email of the entity.
   */
  export const emailMatchingUserEntityProfileEmail =
    createSignInResolverFactory({
      create() {
        return async (info, ctx) => {
          const { profile } = info;

          if (!profile.email) {
            throw new Error(
              'Login failed, user profile does not contain an email',
            );
          }

          return ctx.signInWithCatalogUser({
            filter: {
              'spec.profile.email': profile.email,
            },
          });
        };
      },
    });

  /**
   * A common sign-in resolver that looks up the user using the local part of
   * their email address as the entity name.
   */
  export const emailLocalPartMatchingUserEntityName =
    createSignInResolverFactory({
      create() {
        return async (info, ctx) => {
          const { profile } = info;

          if (!profile.email) {
            throw new Error(
              'Login failed, user profile does not contain an email',
            );
          }
          const [localPart] = profile.email.split('@');

          return ctx.signInWithCatalogUser({
            entityRef: { name: localPart },
          });
        };
      },
    });
}
